User Charge Estimation in Numeric Online Databases: A Methodology |
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Page 33
... central memory and disk storage . The processing costs are measured in terms of block - transfer counts , i.e. the numbers of blocks transferred by queries between the central and secondary storages , and by block - transfer time ( in ...
... central memory and disk storage . The processing costs are measured in terms of block - transfer counts , i.e. the numbers of blocks transferred by queries between the central and secondary storages , and by block - transfer time ( in ...
Page 13
... central memory block slots for data buffering Disk unit related parameters : -s , the average seek time of the disk unit ( in milliseconds ) - r , the theoretical data transfer rate ( in bytes per millisecond ) - nr , the net data ...
... central memory block slots for data buffering Disk unit related parameters : -s , the average seek time of the disk unit ( in milliseconds ) - r , the theoretical data transfer rate ( in bytes per millisecond ) - nr , the net data ...
Page 27
... central memory buffers in toto . When the join attribute selectivities are good , the valuepackets in the join operands are small and occupy a small buffer area , and vice versa . The cost of the merge - join procedure is considerably ...
... central memory buffers in toto . When the join attribute selectivities are good , the valuepackets in the join operands are small and occupy a small buffer area , and vice versa . The cost of the merge - join procedure is considerably ...
Contents
USER CHARGING | 13 |
THE RELATIONAL DATA MODEL | 20 |
CARDINALITY ESTIMATION IN NUMERIC ONLINE | 32 |
Copyright | |
7 other sections not shown
Common terms and phrases
A-names access strategy Appendix approach attribute description set attribute name set attribute selectivity attribute values attributes PRODUCT-NO basis BDBs candidate keys cardinality estimation charging methods CODATA components computed connect-time considered constructed data model database files Database Management Database Management Systems database user developed elementary predicates English Summary example expression F1 and F2 FD-set file design file organization file structures Finland functional dependencies implementation information retrieval Information Science intermediate files inverted file Järvelin join attribute join predicate julkaisuja manipulation MANUF-NO MARKET-SHARE methodology n-tuple NDBs Numeric Databases online databases operand file description procedure cost model processing cost PRODUCTS file QSALES query cardinality query cost modelling query negotiation query optimization query processing query results r-card r-description RA operations records relational algebra relational data model restriction predicate result file description SIGMOD sort-key storage parameters Systems TAHITI TRADEMARK TYPE unit charges University of Tampere upper bound user charge estimation vendor